PCM2900E Equivalent & Substitute Parts

Part Overview

The PCM2900E is a stereo audio codec with USB interface manufactured by Texas Instruments, designed for audio signal processing applications requiring 16-bit resolution with integrated analog-to-digital and digital-to-analog conversion. This component is classified as not for new designs, indicating it has been superseded in the manufacturer's product roadmap. Finding equivalent substitute parts is necessary for legacy system maintenance, repair operations, and applications where design continuity is required.

Substiute Parts

PCM2900E

Texas InstrumentsIn Stock: 15485PCM2900E Datasheet

Current PartRFQ

PCM2903E

Burr BrownIn Stock: 1416PCM2903E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PCM2900E is determined by the following critical parameters:

• Functional equivalence: Stereo audio codec with USB interface, 16-bit resolution, 2 ADCs and 2 DACs
• Package compatibility: 28-SSOP surface mount package with identical physical dimensions
• Electrical performance: Signal-to-noise ratio and dynamic range specifications
• Supply voltage compatibility: Operating voltage ranges for both analog and digital supplies
• Interface protocol: USB data interface capability

The PCM2903E qualifies as a substitute based on matching these core parameters. Both components share identical package geometry, resolution, channel configuration, and performance metrics. Differences in supply voltage ranges and operating temperature windows represent design trade-offs that must be evaluated within the context of the target application.

Parameter Comparison

Engineering Selection Recommendations

The PCM2903E is an active product substitute for the PCM2900E, offering functional equivalence with identical audio performance specifications and package geometry. The primary distinction lies in supply voltage requirements and operating temperature range.

Selection of PCM2903E over PCM2900E is appropriate when:

• The target application operates within the PCM2903E supply voltage window of 3V to 3.6V
• The operating environment remains within 0°C to 70°C
• Active product status and ongoing manufacturer support are required
• Legacy system compatibility with existing PCB layouts and mechanical assemblies is necessary

The PCM2900E remains the appropriate choice for applications requiring the extended operating temperature range of -25°C to 85°C or supply voltages in the 4.35V to 5.25V range, provided component availability through inventory channels is confirmed.

Both components maintain identical export control classifications (EAR99) and tariff codes (8542.39.0001), with no additional compliance considerations affecting substitution decisions.

Frequently Asked Questions (FAQ)

Q: Can PCM2903E be used as a direct replacement for PCM2900E in existing designs?

A: Direct replacement is possible only if the target application's power supply and operating temperature specifications align with PCM2903E parameters. The PCM2903E requires 3V to 3.6V supply voltage and operates within 0°C to 70°C. If the original design uses 4.35V to 5.25V supplies or operates below 0°C or above 70°C, substitution is not viable without circuit redesign.

Q: Are the audio performance characteristics identical between these components?

A: Yes. Both the PCM2900E and PCM2903E provide identical signal-to-noise ratios (89 dB for ADCs, 96 dB for DACs) and dynamic range specifications (89 dB for ADCs, 93 dB for DACs). Audio fidelity and performance metrics are equivalent.

Q: Is the physical package identical?

A: Yes. Both components use the 28-SSOP package with 0.209" width and 5.30mm dimensions. PCB footprints and mechanical mounting are identical, allowing direct board-level substitution without layout modifications.

Q: What is the significance of product status differences?

A: PCM2900E is marked "Not For New Designs," indicating Texas Instruments has discontinued active development and recommends against use in new applications. PCM2903E carries "Active" status, meaning Burr Brown continues manufacturing and supporting this component. For legacy system repairs, both remain available through inventory channels.

Q: Are there compliance or export restrictions affecting substitution?

A: Both components share identical export control classification (EAR99) and tariff codes (8542.39.0001). No additional compliance considerations arise from substitution.